This wiring harness is required for upgrading OEM fog lights on VW Golf 4 and Bora models. It is suitable for fog lights mounted on the headlight assembly. This harness connects the fog lights to the power supply, relays, and light switch. Installation is easy. Selectable options: with switch, without switch. Package contents: wiring harness, relay, relay carrier, light switch (only with item 30011-1). Note: A light switch with fog light function is required.